What is an essential characteristic of "cover" in a military context?

In a military context, "cover" is fundamentally about offering protection during operations. This characteristic is vital because it involves safeguarding troops, equipment, and assets from enemy fire and other threats while they are engaged in missions. Effective cover can take many forms, such as using terrain for concealment or employing fortified structures to shield forces. This protective measure allows military personnel to operate with reduced risk of casualties and enhances their ability to perform objectives, maintain morale, and execute tactics effectively.

Considering the other options, providing supplies is important for sustaining operations but does not relate directly to the concept of "cover." Similarly, while coordination between units is critical for successful missions, it does not inherently involve the protective aspect characterized by cover. Lastly, while secure communications are essential in the modern battlefield to protect information, this aspect does not relate directly to physical protection, which is the core characteristic of cover in a military operation. Therefore, the emphasis on protection distinctly defines what "cover" means in a military setting.